//
//  UserAccount.swift
//  SinaWeibo
//
//  Created by 李旭阳 on 15/11/10.
//  Copyright © 2015年 apple. All rights reserved.
//

import UIKit

class UserAccount: NSObject,NSCoding {
    //用于调用access_token，接口获取授权后的access token
    var access_token :String?
    //access_token的生命周期，单位是秒数
    var expires_in: NSTimeInterval = 0 {
        didSet {
            //timeIntervalSinceNow
            expires_date = NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    
    //过期日期  开发者的过期时间是5年 普通用户是 3 天
    var  expires_date: NSDate?
    //当前授权用户的UID
    var uid: String?
    //用户头像地址 String
    var avatar_large: String?
    //用户名
    var name: String?
    
    //MARK: KVC 初始值
    init(dict:[String: AnyObject]) {
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    //
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {}
    //让打印出来的数据不是编码
    override var description: String {
        let keys = ["access_token","expires_in","uid","avatar_large","name"]
        return dictionaryWithValuesForKeys(keys).description
    }
    
    //MARK: 对象方法  让外面调用的时候直接用对象调用 对象里面有所有的数据
    func saveAccount(){
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        
        NSKeyedArchiver.archiveRootObject(self, toFile: path)
    }
    
    //MARK: 对外提供归档方法 类方法
    class func loadAccount() -> UserAccount?{
        //解归档
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? UserAccount{
            //判断token 是否有效 有效时间是否失效
            if account.expires_date?.compare(NSDate()) == NSComparisonResult.OrderedDescending{
                return account
            }
            
        }
        return nil
    }
    
    //解档 将 磁盘中的二进制数据 -> 转换成自定义对象  跟反序列化很像
    required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObjectForKey("access_token") as? String
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        uid = aDecoder.decodeObjectForKey("uid") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
        name = aDecoder.decodeObjectForKey("name") as? String
        expires_date = aDecoder.decodeObjectForKey("expires_date") as? NSDate
    }
    
    //归档 将对象 转换二进制  保存到磁盘中  序列化
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
        aCoder.encodeObject(expires_date, forKey: "expires_date")
        
    }
}
